Oral Presentation
The disk-outflow system around the massive YSO S255 IR
Presenter: Sheng-Yuan Liu (ASIAA)
The answer to how massive stars acquire their large mass is essential to our understanding of the massive star formation process. There is growing observational evidence suggesting that like their low-mass counterparts, newborn massive stars accrete through similar disk-outflow interaction as a scaled-up version of the standard disk-envelope paradigm. Detailed characterization of this process has, however, been greatly hindered by the fact these disks/toroids were barely resolved in previously observations. We present new ALMA observations in investigating the elusive disk in the nearby massive star forming region S255 IR. High quality ALMA imaging of its dust continuum, and most importantly, molecular line emission resolving the gas motion in the vicinity of the massive young stellar object provides us clues to whether such disks or toroids around massive young stellar objects are Keplerian and stable and and how the disks and outflows interact.
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